Phototherapy Applied in Association With Muscular Training

NCT ID: NCT02715050

Last Updated: 2016-10-20

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 48 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2016-03-31
• Study Completion Date: 2016-10-31

Brief Summary

The effects of phototherapy has been widely studied by some research groups. The investigators know that there are positive results with light application to improve muscle performance and delay fatigue. However, there are few studies showing its´ effects on muscular training. Therefore, the aim of this study was to assess the effects of phototherapy applied at different times during 12 weeks of strength training. For such, 48 volunteers, healthy male, from 18 to 35 years old were recruited to perform a strength training protocol for the anterior muscle of the thigh development. Volunteers performed the training protocol three times a week for 12 weeks. There were assessed isometric peak torque in isokinetic dynamometer, concentric peak torque, 1-repetition maximum test in the leg extension and leg press machines and bilateral thigh perimetry.

Detailed Description

This is a clinical, randomized, controlled placebo and double-blind study. Forty-eight participants performed muscular training protocol. Subjects practiced a protocol training with 60% of the load followed by 80% of the load, measured through 1-repetition maximum test, in all sessions of the training protocol. The training protocol consisted in performing 3 sets of 7 repetitions with 60% of 1-RM, and 4 set of 7 repetitions with 80% of 1-RM. This protocol was performed in every sessions, three times a week, employing leg press and leg extension machines.

Phototherapy, active or placebo, were applied in 6 different points of anterior muscle of the thigh before and after each training session. Only one investigator, that did not participate in any phase of the assessments and trainings sessions, knew about what program is active or placebo in phototherapy device. Randomisation carried out by a simple drawing of lots (A, B, C, or D) in the first visit. The phototherapy unit emitted the same sound regardless of the program used, active or placebo. Either strength training lasted 12 weeks and assessments were performed at baseline, 4, 8 and 12 weeks. There were evaluated maximal voluntary contraction (MVC), concentric torque, bilateral thigh perimetry and 1-repetition maximum test (1-RM).

Conditions

Muscle Adaptation

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: SUPPORTIVE_CARE
• Blinding Strategy: QUADRUPLE

Study Groups

Group A - Active or Placebo Phototherapy

Participants enrolled in this group performed a training protocol for 12 weeks with light application before and after the exercise protocol. The phototherapy device was divided in program 1 and program 2. One of these programs consisted in active phototherapy and the other placebo.

The subjects allocated in group A, received program 1 before strength training, and the same program 1 after training.

Group Type: EXPERIMENTAL

Active or Placebo Phototherapy (MR4)

Intervention Type: DEVICE

Group B - Active or Placebo Phototherapy

Participants enrolled in this group performed a training protocol for 12 weeks with light application before and after the exercise protocol. The phototherapy device was divided in program 1 and program 2. One of these programs consisted in active phototherapy and the other placebo.

The subjects allocated in group B, received program 1 before strength training, and program 2 after training.

Group Type: EXPERIMENTAL

Active or Placebo Phototherapy (MR4)

Intervention Type: DEVICE

Group C - Active or Placebo Phototherapy

Participants enrolled in this group performed a training protocol for 12 weeks with light application before and after the exercise protocol. The phototherapy device was divided in program 1 and program 2. One of these programs consisted in active phototherapy and the other placebo.

The subjects allocated in group C, received program 2 before strength training, and program 1 after training.

Group Type: EXPERIMENTAL

Active or Placebo Phototherapy (MR4)

Intervention Type: DEVICE

Group D - Active or Placebo Phototherapy

Participants enrolled in this group performed a training protocol for 12 weeks with light application before and after the exercise protocol. The phototherapy device was divided in program 1 and program 2. One of these programs consisted in active phototherapy and the other placebo.

The subjects allocated in group D, received program 2 before strength training, and program 2 after training.

Group Type: EXPERIMENTAL

Active or Placebo Phototherapy (MR4)

Intervention Type: DEVICE

Interventions

Active or Placebo Phototherapy (MR4)

Intervention Type: DEVICE

Other Intervention Names

MR4 device - device that combines super-pulsed lasers, and red and infrared LEDs (Multi Radiance Medical, Solon, OH, USA)

Eligibility Criteria

Inclusion Criteria

• healthy individuals,
• active, that performed less than two exercise sessions per week
• when they presented musculoskeletal injury to the hips or knees in the previous 2 months,
• used pharmacological agents or nutritional supplements regularly, and
• Subjects that did not attend a minimum rate of 80% of all strength training sessions
• Suffered musculoskeletal injury during the ongoing of the study were also excluded.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 35 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: Yes

Sponsors

Fundação de Amparo à Pesquisa do Estado de São Paulo

OTHER_GOV

Sponsor Role: collaborator

University of Nove de Julho

OTHER

Sponsor Role: lead

Responsible Party

Adriane Aver Vanin

Phd researcher

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Ernesto Leal-Junior, PhD

Role: STUDY_DIRECTOR

University of Nove de Julho

Locations

Universidade Nove de Julho

São Paulo, São Paulo, Brazil

Countries

Brazil

References

Leal-Junior EC, Vanin AA, Miranda EF, de Carvalho Pde T, Dal Corso S, Bjordal JM. Effect of phototherapy (low-level laser therapy and light-emitting diode therapy) on exercise performance and markers of exercise recovery: a systematic review with meta-analysis. Lasers Med Sci. 2015 Feb;30(2):925-39. doi: 10.1007/s10103-013-1465-4. Epub 2013 Nov 19.

Reference Type: BACKGROUND

PMID: 24249354 (View on PubMed)

Seynnes OR, de Boer M, Narici MV. Early skeletal muscle hypertrophy and architectural changes in response to high-intensity resistance training. J Appl Physiol (1985). 2007 Jan;102(1):368-73. doi: 10.1152/japplphysiol.00789.2006. Epub 2006 Oct 19.

Reference Type: BACKGROUND

PMID: 17053104 (View on PubMed)

Antonialli FC, De Marchi T, Tomazoni SS, Vanin AA, dos Santos Grandinetti V, de Paiva PR, Pinto HD, Miranda EF, de Tarso Camillo de Carvalho P, Leal-Junior EC. Phototherapy in skeletal muscle performance and recovery after exercise: effect of combination of super-pulsed laser and light-emitting diodes. Lasers Med Sci. 2014 Nov;29(6):1967-76. doi: 10.1007/s10103-014-1611-7. Epub 2014 Jun 19.

Reference Type: RESULT

PMID: 24942380 (View on PubMed)

Other Identifiers

PhD437.894

Identifier Type: -

Identifier Source: org_study_id